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유의미한 숫자 포함 이미지의 대량 생성을 위한 딥러닝 기반 시스템
이지현,차영화,박병준 대한전기학회 2020 전기학회논문지 Vol.69 No.12
We present a deep learning-based system for generating images, such as pictures of electricity meters, in which numbers and letters play an important role. A large amount of image data is often required to build a deep learning-based system for image recognition, so it would be useful to have a system that can automatically generate realistic images. GANs can be used for this purpose, but there are some hurdles to overcome for GANs to create realistic images in which texts are embedded. Most of existing approaches focus on generating either the textual images or the non-textual ones only, not the ones where the textual part is embedded in a small area while still being clearly identifiable. In order to solve this problem, we propose a deep learning-based approach that attempts to learn textual images and non-textual ones independently before generating a set of complete images combined from the learned results. Also, we demonstrate the strengths of the proposed system by providing some empirical results on the electricity meter image data
박동원,안성옥,Park, Dong-Won,An, Syung-Og 배재대학교 공학연구소 1998 공학논문집 Vol.3 No.1
본 논문에서는 지능형 실시간 제어 시스템 구축을 위하여 근사값 계산 방법의 적용을 rule-based 시스템과 관련하여 도모한다. 자원 정보에 대한 획득 및 표현 방안을 탐색하고, 이를 구현하기 위한 소프트웨어 설계 및 구현된 시스템의 타당성을 판단하기 위한 기준을 제시한다. This paper examines the application of imprecise computation technique in the context of rule-based systems and the development of a shell for building rule-based real-time control systems. Research issues to be addressed in order to build such a shell include acquisition and expression of resource information, development of a software architecture to support resource-based selectivity, and acceptability criteria for validating results obtained.
박동원,최승복,Park, Dong-Won,Choi, Seung-Bok 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.1
A moving sliding surface(MSS) was proposed earlier for the second-order variable structure control system(VSCS). The MSS was disigned to pass arbitrary initial conditions, and subsequently moved towards a predetermined sliding surface by rotating and/or shifting. This methodology led to fast and robust control responses of the second-order VSCS, especially in a reaching phase. However, the moving algorithm of the MSS was too complicated to be employed to the high-order VSCS. To resolve this problem, a new moving algorithm based on the fuzzy theory is proposed in this paper. For the generalization of the MSS, the conditions for rotating or shifting are firstly investigated. Then the fuzzy algorithm is formulated by adopting the values of the surface function and the total discontinuity gain as input variables, and the variation of the surface function as output variable. The position control problem of an electrohydraulic servomechanism is adopted in order to demonstrate the efficiency and the feasibility of the proposed MSS associated with fuzzy algorithm.
지하수 오염방지를 위한 산업폐기물 관리평가 모델(IWEM)의 국내 적용성 분석
박동원,우남칠,정다위,Park, Dong-Won,Woo, Nam-C.,Chung, David 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.1
Selection of appropriate liner type would be the most important factor to prevent groundwater contamination by leachate from waste management site. This report introduces the IWEM (Industrial Waste Management Evaluation Model) developed by US EPA to evaluate the potential pollution of groundwater under the waste management unit and to suggest an appropriate type of liner, and provides with the results of IWEM application to a coal-ash landfill site in Korea as a case study. IWEM uses a standard method using a database, a decision-making process based on site characteristics, and the user-friendly input-and-output system. Authors evaluate this model to be applicable in Korea provided that the database is replaced into local data.
박동원,Park, Dong-Won 배재대학교 공학연구소 1998 공학논문집 Vol.3 No.1
This paper describes a model suitable for real-time languages, which explicitly defines a set of resource objects. The resource objects are constituted in a specialization hierarchy which allows programmers to perform resource handling at any desired level of detail, as well as providing a uniform interface. This object-oriented model is used to extend the applicability of the imprecise computation approach to deal with shortfalls of any computational resource, and enable to build real-time systems which can handle dynamic situations. 본 논문에서는 실시간 프로그래밍 언어와 적절히 연동할 수 있는 자원관리 모델을 제시한다. 시스템의 자원을 계층적으로 관리하여 일관된 인터페이스 환경을 유지하면서 미세조정까지 가능한 자원 이용환경을 제공하고자 하는 것이다. 이와 같은 객체지향 자원관리 기법은 계산 시간 부족을 처리하는 근사값 접근방법의 효과를 더욱 상승시킬 것이며, 또한 동적 실시간 시스템을 구축함도 용이롭게 할 수 있을 것이다.
ER 현수장치를 갖는 궤도 차량의 진동제어 (II);궤도차량의 모델링 및 제어
박동원,최승복,강윤수,서문석,신민재,최교준,Park, Dong-Won,Choe, Seung-Bok,Gang, Yun-Su,Seo, Mun-Seok,Sin, Min-Jae,Choe, Gyo-Jun 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.11
This paper presents dynamic modeling and controller design of a tracked vehicle installed with the double rod type ERSU(electro-rheological suspension unit). A 16 degree-of-freedom model for the tracked vehicle is established by Lagrangian method followed by the formulation of a new sky-ground hook controller. This controller takes account for both the ride quality and the steering stability. The weighting parameter between the two performance requirements is adopted to adjust required performance characteristics with respect to the operation conditions such as road excitation. The parameter is appropriately determined by employing a fuzzy algorithm associated with the vehicle motion. Computer simulations are undertaken in order to demonstrate the effectiveness of the proposed control system. Acceleration values at the driver's seat are analyzed under bump road profile, while frequency responses of vertical acceleration are investigated under random road excitation.
박동원,Park, Dong-Won 배재대학교 자연과학연구소 1995 自然科學論文集 Vol.7 No.-
실 시간 처리 시스템에서의 시간제약 조건을 충족시키는 바람직한 수단으로 근사값 계산 방안이 제안되었지만, 이에 대한 근본적 이론연구는 깊이 고찰되어 있지 않은 형편이다. 이에 본 논문에서는 실제 응용그로그램에서의 근사값 계산 방안의 체택 당위성을 판단할 수 있는 이론적 결정 방법을 제시하였다. 이로써 실시간에서의 시스템 예측도와 대응능력을 높여, 효과적인 자원관리와 제약조건을 충족시킬 수 있도록 한다. Imprecise computation has been suggested as a promising model of real-time computing in order to deal with timing constraints imposed by the environment. However, the theoretical foundation of the technique has not been fully explored. To address this, a decision-theoretic foundation of imprecise computation is proposed. The main benefit of such a treatment is that it enables the qualitative assumptions underlying imprecise computation techniques to be explicitly stated in a formal way. The theoretical foundation laid out in this paper, hence, will not only enable the justification of using imprecise computation techniques for a real-time application, but will also facilitate the development of extended techniques for more complexs real-time systems.